Now we study the effects of the Coulomb interaction in terms of the RG. To perform the RG transformation,
we decompose each field into the slow and fast modes: \(\psi _{\xi }=\psi _{\xi <}+\psi _{\xi >}\)  and
\(\phi =\phi _<+\phi _>\)  where the subscripts \(<\)  and \(>\)  denote the slow and fast modes, respectively. Due
to the lack of the full rotation symmetry, we adopt the regularization scheme employed in the anisotropic
Weyl fermions[1]} and double WSMs[2]}, [3]}. That is, the fast modes consist of
the Fourier components between the cylindrical shell \(\Lambda /s<|\tilde{{p}}_{\perp }|<\Lambda \)  and
\(|\tilde{p}_3|<+\infty \)  where \(s=e^l>1\) .
